Launching a Custom RRC-20 Token

The RRC-20 standard is Rootstock's implementation of the ERC-20 standard. Because Rootstock is fully EVM-compatible, you can use the same Solidity code and tools (Hardhat, Foundry, Remix) to launch tokens that benefit from Bitcoin's security and Rootstock's low transaction costs.

Prerequisites

• Development Framework: Hardhat or Foundry installed locally.
• Testnet Funds: Obtain t-rBTC from the Rootstock Faucet.
• OpenZeppelin Contracts: We use these industry-standard libraries for security.

Getting Started

1. Project Initialization

Set up your workspace and install the OpenZeppelin dependency.

mkdir rrc20-token && cd rrc20-token
npm init -y
npm install --save-dev hardhat @openzeppelin/contracts
npx hardhat init # Choose "Create a TypeScript project"

2. Write the Token Contract

Create contracts/MyToken.sol. This example features a fixed-supply token that is minted entirely to the deployer's address.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract MyToken is ERC20 {
    constructor(uint256 initialSupply) ERC20("Rootstock Asset", "RSA") {
        _mint(msg.sender, initialSupply * (10 ** decimals()));
    }
}

3. Deploy to Testnet

Configure your hardhat.config.ts with the Rootstock Testnet RPC (https://public-node.testnet.rsk.co) and run the deployment script.

npx hardhat ignition deploy ./ignition/modules/TokenModule.ts --network rskTestnet

Troubleshooting

• Verification Failed: If you cannot verify your contract on the explorer, ensure the Solidity compiler version in your config exactly matches the one used during deployment.

• Insufficient Gas: If transactions fail, manually set your gas price to at least 0.06 Gwei, which is the current minimum for the Rootstock network.

Related Use Cases or Resources

• Rootstock Explorer (Token Tracker)

• Building a Crowdfunding App

• Institutional Governance with stRIF